CN216317932U

CN216317932U - Steel plate cutter for taking internal fixation

Info

Publication number: CN216317932U
Application number: CN202122864090.7U
Authority: CN
Inventors: 姬树青; 刘丽; 孙力; 韩洪胜; 侯金光; 马慧慧; 贾智杰; 孟凡显
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-04-19
Anticipated expiration: 2031-11-22

Abstract

The utility model relates to a steel plate cutter for taking internal fixation, which comprises a cutter body; the cutter body comprises a cutting section and a handle section which are integrally connected; the cutting section is provided with a fixing part for fixing the steel plate and a cutting part for realizing a cutting function; the cutting part comprises a rotating rod and a cutting edge, and the cutting edge is arranged at the first end of the rotating rod; the fixed part is provided with a through hole for the rotary rod and the cutting edge to extend into and move, and the rotary rod and the cutting edge move relative to the cutting section; through this kind of mode with the steel sheet fixed in the fixed part, aim at the steel sheet with the cutting edge after, rotatory rotary rod and cutting edge of rethread realize the cutting function to the steel sheet.

Description

Steel plate cutter for taking internal fixation

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a steel plate cutter for internal fixation.

Background

With the development and progress of science and technology, bone science has been greatly developed in diagnosis and treatment. Bone science is a specialty or discipline of medicine, which specializes in the study of the anatomy, physiology, and pathology of the skeletal muscle system, the maintenance and development of the normal morphology and function of this system using drugs, surgery, and physical methods, and the treatment of injuries to this system.

The steel plate is often required to be used for fixing and connecting bones in clinical operations, the internal fixing instrument is required to be taken out after the operations are healed, but the phenomenon that the steel plate is difficult to take out due to the fusion of the screw and the steel plate caused by the sliding of the screw or the cold welding state often occurs; at present, the screw cap is usually broken by a grinding drill or a tungsten steel drill clinically, and then the steel plate is taken down, but the precision of the manual operation is not high, and peripheral soft tissues are easily damaged; in addition, metal scraps after the screw cap is broken can pollute all around, increase the infection probability, increase operation time, waste time and energy.

In order to overcome the problems, the utility model provides a cutter for taking the steel plate for internal fixation.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems of the background art, the utility model provides a cutter for taking a steel plate for internal fixation.

A cutter for taking a steel plate for internal fixation comprises a cutter body; the cutter body comprises a cutting section and a handle section which are integrally connected; the cutting section is provided with a fixing part for fixing the steel plate and a cutting part for realizing a cutting function; the cutting part comprises a rotating rod and a cutting edge, and the cutting edge is arranged at the first end of the rotating rod; the fixed part is provided with a through hole for the rotary rod and the cutting edge to extend into and move, and the rotary rod and the cutting edge move relative to the cutting section; through this kind of mode with the steel sheet fixed in the fixed part, aim at the steel sheet with the cutting edge after, rotatory rotary rod and cutting edge of rethread realize the cutting function to the steel sheet.

Further, the fixing part comprises a fixing block integrally connected with the handle section, and a first working block and a second working block which are arranged at the first end of the fixing block; the first working block is integrally connected with the fixed block, and a first adjusting structure for adjusting the position of the second working block is arranged in the fixed block; during the use, the steel sheet is placed between first work piece and second work piece, adjusts the distance between second work piece and the first work piece through operating first regulation structure, fixes the steel sheet well.

Furthermore, the upper ends of the first working block and the second working block are planes, one surface of the first working block facing the second working block is provided with a screwer, and one surface of the second working block facing the first working block is also provided with a screwer; the threading tool is inserted into the gap between the steel plate and the bone to fix the steel plate, so that the fixation instability is prevented, and the cutting is not facilitated.

Further, the through-hole is close to the upper end of first work piece and second work piece, and the cutting effect when just can guarantee fixed steel sheet is pressed close to the upper end to the position of through-hole.

Furthermore, the first surface of the first working block and the second surface of the second working block are both provided with threaded surfaces, and the first surface of the first working block and the second surface of the second working block are arranged oppositely, so that the steel plate is prevented from slipping off when being fixed.

Furthermore, the first adjusting structure comprises a strip-shaped moving block arranged at the second end of the second working block, a spiral wheel arranged inside the fixed block and a connecting rod arranged inside the spiral wheel; the lower end of the moving block is in threaded fit with the helical wheel; the connecting rod can rotate relative to the fixed block; the spiral wheel is rotated in such a way, so that the second working block and the moving block are close to or far away from the first working block under the driving of the spiral wheel.

Further, the connecting rod and the helical wheel are coaxially arranged.

Or the first adjusting structure comprises a strip-shaped moving block arranged at the second end of the second working block and a moving handle arranged on one side of the moving block; a first end of the fixed block is provided with an extension groove for placing and horizontally moving the moving block and the moving handle, and the groove wall of the extension groove, the outer side of the moving block and one side of the moving handle tightly attached to the fixed block are all provided with friction surfaces; the effect of moving the position of the moving block and the second working block relative to the fixed block is realized by operating the moving handle. The arrangement of adjusting the position of the second working block by horizontally moving the moving handle saves more time in adjustment.

Further, a second adjusting structure matched with the first adjusting structure is arranged at the second end of the moving block, and the second adjusting structure comprises a ratchet arranged at the second end of the moving block and a circular gear matched with the ratchet for use; the circular gear is rotated to drive the moving block and the second working block to move; the arrangement of the circular gear saves more labor.

Furthermore, a placing cavity for the circular gear to rotate is arranged in the fixed block and is communicated with the extending groove; a supporting shaft is arranged in the middle of the circular gear, two ends of the supporting shaft are respectively connected with the side wall of the placing cavity, and the supporting shaft does not rotate along with the rotation of the circular gear.

Furthermore, a limiting piece for fixing the circular gear is arranged on the side wall of the placing cavity; when the second working block is adjusted to a proper position, the circular gear is clamped through the limiting part, and the position stability of the second working block is further ensured.

Furthermore, a rotating handle which is convenient to rotate is arranged on one side of the circular gear.

Furthermore, the through holes are arranged at two ends of the first working block and penetrate through the first working block; the outside of rotary rod and the pore wall of through-hole set up helicitic texture, and stability when the relative through-hole of rotary rod removed can be guaranteed to threaded connection's mode. The second end of the rotating rod is provided with a rotating handle which is convenient to operate.

Furthermore, the cutting edge and the rotating rod are connected integrally, so that the stability during cutting is ensured.

Or the cutting edge is movably connected with a rotating rod, a first thread bulge is arranged at the first end of the rotating rod, and a second thread bulge for the first thread bulge to extend into and be screwed down is arranged at the second end of the cutting edge; by extending the first thread protrusion into the second thread protrusion and screwing, the stable connection of the rotating rod and the blade is ensured. The arrangement is convenient for replacing the proper cutting edge according to different requirements of a patient on the steel plate.

Furthermore, the straight line of the cutting edge is perpendicular to the plane of the first working block or the second working block provided with the screwer, and the cutting edge is also provided with a slope so as to be tightly attached to the upper edge of the screw, thereby being convenient for cutting and getting tighter and tighter.

Furthermore, a limiting block is arranged at one end, close to the rotating rod, of the cutting edge, so that the cutting edge is prevented from rotating relative to the first working block during cutting. The length range of the limiting block is 0.5-1 cm. The stopper sets up to the polygonal piece that has the edges and corners, and the edges and corners of polygonal piece protrude the lateral wall of rotary rod, and polygonal piece can set up to the polygonal piece that has the effect of preventing to rotate such as triangle-shaped arris or quadrangle arris or pentagon arris, avoids the cutting edge to take place rotatoryly when the cutting, and rotatory threaded rod is responsible for impels the cutting.

Further, the cutting section sets up to square, conveniently sets up fixed part and cutting part.

The utility model has the beneficial effects that: 1. by arranging the steel plate cutter, the cutting precision is ensured when medical personnel cut the steel plate, the steel plate is fixed by the fixing part, and then the rotating rod is rotated to push the cutting edge, so that the cutting effect can be realized, the operation that a screw cap is broken by a grinding drill or a tungsten steel drill and then the steel plate is taken down in the prior art is well solved, and the time and the labor are saved; meanwhile, the phenomenon that the peripheral tissues are polluted by the scraps after the screw cap is broken is avoided, the infection probability of the patient is effectively reduced, and the comfort level of the patient is ensured; 2. the position of the second working block can be well adjusted in a time-saving and labor-saving manner by arranging the first adjusting structure and the second adjusting structure, so that the operation requirements of medical workers on the surgical instrument can be well met; 3. through the cutting edge and the rotary rod which are movably connected, the cutting requirements of steel plates of different types and sizes can be met.

Drawings

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a schematic view of the overall structure of embodiment 2 of the present invention;

FIG. 3 is an enlarged schematic view of a cutting segment according to examples 2 and 3 of the present invention;

FIG. 4 is an enlarged sectional view of a cutting segment according to examples 2 and 3 of the present invention;

fig. 5 is a schematic structural view of a second working block and a moving block according to embodiments 2 and 3 of the present invention;

FIG. 6 is an enlarged schematic view of the upper end of the fixing block according to embodiments 2 and 3 of the present invention;

FIG. 7 is a schematic view of the structure of the embodiment 4 of the present invention in which the rotating rod and the blade are integrally connected;

FIG. 8 is a schematic structural diagram of an embodiment 4 of the present invention in which a rotating rod and a blade are integrally connected and a limiting block is disposed between the rotating rod and the blade;

FIG. 9 is a perspective view showing the movable connection of the rotary lever and the blade in embodiment 4 of the present invention;

in the figure, 1, a handle segment; 21. rotating the rod; 22. a blade; 23. a limiting block; 31. a through hole; 32. a fixed block; 33. a first work block; 34. a second work block; 35. a moving block; 36. a movable handle; 37. extending into the groove; 38. a ratchet; 39. a circular gear; 310. a placement chamber; 311. a limiting member; 312. rotating the handle; 313. a support shaft; 314. a thread cutter; 315. a helical wheel; 316. a connecting rod; 317. a containing groove.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below by specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and other advantages and effects of the present invention can be easily understood by those skilled in the art from the disclosure of the present specification. The present invention can be implemented or applied by other different specific embodiments, and the features in the following embodiments and embodiments can be combined with each other without conflict, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, the steel plate cutter for internal fixation in the present embodiment includes a cutter body; the cutter body comprises a cutting section and a handle section 1 which are integrally connected; the cutting section is provided with a fixing part for fixing the steel plate and a cutting part for realizing a cutting function; the cutting part comprises a rotating rod 21 and a blade 22, and the blade 22 is arranged at a first end of the rotating rod 21; a through hole 31 for the rotary rod 21 and the blade 22 to extend and move is arranged on the fixed part, and the rotary rod 21 and the blade 22 move relatively to the cutting section; through this kind of mode with the steel sheet fixed in the fixed part, aim at the cutting edge 22 behind the steel sheet, the rethread rotary rod 21 and cutting edge 22 realize the cutting function to the steel sheet.

The fixing part comprises a fixing block 32 integrally connected with the handle section 1, a first working block 33 and a second working block 34 arranged at the first end of the fixing block 32; the first working block 33 is integrally connected with the fixed block 32, and a first adjusting structure for adjusting the position of the second working block 34 is arranged in the fixed block 32; when the steel plate fixing device is used, the steel plate is placed between the first working block 33 and the second working block 34, the distance between the second working block 34 and the first working block 33 is adjusted by operating the first adjusting structure, and the steel plate is well fixed.

The upper ends of the first working block 33 and the second working block 34 are planes, a thread cutter 314 is arranged on one surface of the first working block 33 facing the second working block 34, and a thread cutter 314 is also arranged on one surface of the second working block 34 facing the first working block 33; the threading tool 314 is inserted into the gap between the steel plate and the bone to fix the steel plate, thereby preventing unstable fixation and adverse cutting. Preferably, the upper surface of the screwer 314 is parallel to the upper surface of the first working block 33; in a top view state, the shape of the screw blade 314 is triangular, the distance between the point of the tip of the screw blade 314 and the middle of the line segment opposite to the point of the screw blade 314 is L1, the shortest distance between the point of the tip of the screw blade 314 and the surface of the first working block 33 or the second working block 34 where the screw blade 314 is arranged is L2, and L1 is greater than L2. The through hole 31 is close to the upper ends of the first working block 33 and the second working block 34, and the cutting effect when the steel plate is fixed can be ensured only by the position of the through hole 31 close to the upper ends. The first surface of the first working block 33 and the second surface of the second working block 34 are both provided with threaded surfaces, and the first surface of the first working block 33 and the second surface of the second working block 34 are oppositely arranged, so that the steel plate is prevented from slipping off when being fixed.

The first adjusting structure comprises a long moving block 35 arranged at the second end of the second working block 34, a spiral wheel 315 arranged inside the fixed block 32, and a connecting rod 316 arranged inside the spiral wheel 315; the lower end of the moving block 35 is in threaded fit with the spiral wheel 315; the connecting rod 316 can rotate relative to the fixed block 32; the helical wheel 315 rotates in such a manner that the helical wheel 315 causes the second working block 34 and the moving block 35 to approach or separate from the first working block 33 by the helical wheel 315. The connecting rod 316 and the helical wheel 315 are coaxially arranged. The fixing block 32 is provided with a receiving groove 317, the spiral wheel 315 is placed in the receiving groove 317, a circular hole is formed in a side wall of the fixing block 32, the circular hole is communicated with the receiving groove 317, and the connecting rod 316 penetrates through the circular hole. The end of the connecting rod 316 far away from the spiral wheel 315 is provided with an adjusting bayonet. The cutting section sets up to square, conveniently sets up fixed part and cutting part.

The principle that the distance between first work piece 33 and the second work piece 34 is adjusted to this embodiment adopts the regulation principle of spanner, simple structure, and convenient operation does benefit to the disinfection.

Example 2

Referring to fig. 2, a technical feature of the present embodiment is that the first adjustment structure is provided, and the specific technical feature is: the first adjusting structure comprises a strip-shaped moving block 35 arranged at the second end of the second working block 34 and a moving handle 36 arranged on one side of the moving block 35; an extending groove 37 for placing and horizontally moving the moving block 35 and the moving handle 36 is arranged at the first end of the fixed block 32, and friction surfaces are arranged on the groove wall extending into the groove 37, the outer side of the moving block 35 and one side of the moving handle 36 tightly attached to the fixed block 32; the effect of moving the moving block 35 and the second working block 34 relative to the fixed block 32 is achieved by operating the moving handle 36. This arrangement for adjusting the position of second work block 34 by moving movable handle 36 horizontally saves more time in the adjustment.

The through holes 31 are arranged at two ends of the first working block 33 and penetrate through the first working block 33; the outer side of the rotating rod 21 and the hole wall of the through hole 31 are provided with thread structures, and the thread connection mode can ensure the stability of the rotating rod 21 in moving relative to the through hole 31. The second end of the rotating rod 21 is provided with a rotating handle for easy operation.

Example 3

Referring to fig. 2 to 6, the present embodiment adds technical features of a second adjustment structure on the basis of embodiment 2, and the specific technical features are as follows: a second adjusting structure matched with the first adjusting structure is arranged at the second end of the moving block 35, and comprises a ratchet 38 arranged at the second end of the moving block 35 and a circular gear 39 matched with the ratchet 38; the circular gear 39 is rotated to drive the moving block 35 and the second working block 34 to move; this arrangement of the circular gear 39 is more labor-saving.

A placing cavity 310 for the circular gear 39 to rotate is arranged in the fixing block 32, and the placing cavity 310 is communicated with the extending groove 37; a supporting shaft 313 is arranged in the middle of the circular gear 39, two ends of the supporting shaft 313 are respectively connected with the side wall of the placing cavity 310, and the supporting shaft 313 does not rotate along with the rotation of the circular gear 39. A limiting piece 311 for fixing the circular gear 39 is further arranged on the side wall of the placing cavity 310; when the second working block 34 is adjusted to a proper position, the circular gear 39 is clamped by the limiting member 311, and the position stability of the second working block 34 is further ensured. A rotation handle 312 for facilitating rotation is provided at one side of the circular gear 39.

Example 4

Referring to fig. 7 to 9, in this embodiment, on the basis of embodiment 1 or embodiment 2, specific settings are made on the connection relationship between the rotating rod 21 and the blade 22 in the cutting portion and specific features of the blade 22, and the specific technical features are as follows: the blade 22 and the rotating rod 21 are integrally connected to ensure stability during cutting. Or the cutting edge 22 is movably connected with the rotating rod 21, a first thread bulge is arranged at the first end of the rotating rod 21, and a second thread bulge for the first thread bulge to extend into and be screwed is arranged at the second end of the cutting edge 22; by inserting the first screw boss into the second screw boss and screwing it, the stable connection of the rotary rod 21 and the blade 22 is ensured. This arrangement facilitates replacement of the blade 22 as appropriate for the patient's different needs for the steel plate. The straight line of the cutting edge 22 is parallel to or has an included angle with the plane of the first working block 33 or the second working block 34 where the thread cutter 314 is arranged, so that the cutting edge is tightly attached to the upper edge of the screw and the cutting is more and more tight. A stopper 23 is provided at an end of the blade 22 adjacent to the rotating lever 21 to prevent the blade 22 from rotating relative to the first working block 33 during cutting. The length range of the limiting block 23 is 0.5-1 cm. The limit block 23 is a polygonal block having a corner protruding from the outer sidewall of the rotating rod 21, and the polygonal block may be a polygonal block having a rotation preventing function, such as a triangular or quadrangular or pentagonal edge, to prevent the rotating rod 21 and the blade 22 from rotating during cutting.

When the device is used, the steel plate is fixed at the position of a human skeleton, the steel plate is stably clamped by the first working block 33, the second working block 34 and the screwer 314, and then the steel plate is cut by the rotating rod 21 and the cutting edge 22.

The above description of the embodiments is only for the understanding of the present invention. It should be noted that modifications could be made to the utility model without departing from the principle of the utility model, which would also fall within the scope of the claims of the utility model.

Claims

1. A cutter for taking a steel plate for internal fixation comprises a cutter body; the cutter is characterized in that the cutter body comprises a cutting section and a handle section which are integrally connected; the cutting section is provided with a fixing part for fixing the steel plate and a cutting part for realizing a cutting function; the cutting part comprises a rotating rod and a cutting edge, and the cutting edge is arranged at the first end of the rotating rod; the fixed part is provided with a through hole for the rotary rod and the cutting edge to extend into and move, and the rotary rod and the cutting edge move relative to the cutting section.

2. The steel plate cutter for internal fixation as claimed in claim 1, wherein the fixing portion comprises a fixing block integrally connected to the handle section, a first working block and a second working block provided at a first end of the fixing block; the first working block is integrally connected with the fixed block, and a first adjusting structure used for adjusting the position of the second working block is arranged inside the fixed block.

3. The steel plate cutter for internal fixation of claim 2, wherein the upper ends of the first and second working blocks are flat, and a thread cutter is provided on a surface of the first working block facing the second working block, and a thread cutter is also provided on a surface of the second working block facing the first working block; the through hole is close to the upper ends of the first working block and the second working block.

4. The steel plate cutter for internal fixation of claim 2, wherein the first working block first surface and the second working block second surface are both provided as thread surfaces, and the first working block first surface and the second working block second surface are provided in opposition.

5. The steel plate cutter for internal fixation as claimed in claim 2, wherein the first adjusting structure comprises a long moving block disposed at the second end of the second working block, a helical wheel disposed inside the fixed block, and a connecting rod disposed inside the helical wheel; the lower end of the moving block is in threaded fit with the helical wheel; the connecting rod can rotate relative to the fixed block; the connecting rod and the helical wheel are coaxially arranged.

6. The steel plate cutter for internal fixation as claimed in claim 2, wherein the first adjusting structure comprises a long moving block disposed at the second end of the second working block, and a moving handle disposed at one side of the moving block; and a first end of the fixed block is provided with an extending groove for placing the moving block and the moving handle and horizontally moving.

7. The steel plate cutter for internal fixation as claimed in claim 6, wherein a second adjusting structure is provided at the second end of the moving block for cooperating with the first adjusting structure, the second adjusting structure comprising a ratchet tooth provided at the second end of the moving block and a circular gear for cooperating with the ratchet tooth.

8. The internal fixation steel plate cutter according to any one of claims 1 to 7, wherein the blade and the rotating rod are integrally connected.

9. The internal fixation steel plate cutter according to any one of claims 1 to 7, wherein the blade is movably connected to a rotating rod, a first thread protrusion is provided at a first end of the rotating rod, and a second thread protrusion into which the first thread protrusion is inserted and screwed is provided at a second end of the blade.

10. The internal fixation steel plate cutter as claimed in claim 1, wherein a stopper is provided at an end of the blade adjacent to the rotary rod.